[0018] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.
[0019] A double-mold flip casting machine for casting pistons, its structure is as follows figure 1 Shown. It includes a frame 1, on which a workbench and a manipulator are arranged, and an outer mold mechanism, a center core mechanism and a top mold mechanism are arranged on the workbench.
[0020] The workbench 4 is a rectangular flat structure, and the center of the workbench is provided with a through hole for placing the mold. The workbench is movably set on the center bracket 15 of the frame through the rotating shafts 14 located on both sides of the through hole. A turning oil cylinder 12 is arranged under one end of the workbench. The piston rod of the turning oil cylinder is connected with the bottom surface of the workbench for making The worktable rotates around the rotating shaft under the lifting operation of the turning oil cylinder. In this embodiment, the rotation angle of the worktable is 20 degrees.
[0021] Two sets of outer mold mechanisms are symmetrically arranged, namely the left outer mold mechanism and the right outer mold mechanism. The left outer mold mechanism and the right outer mold mechanism are respectively located on both sides of the two rotating shaft axes on the worktable. The left outer mold mechanism includes a guide rail 9, an outer mold seat for installing the left outer mold, and an outer mold oil cylinder. The right outer mold mechanism also includes a guide rail, an outer mold seat for installing the right outer mold, and an outer mold cylinder. The guide rails of the outer mold mechanism are fixedly arranged on the worktable, and two guide rails are symmetrically fixed at the two ends of the through hole of the worktable, and the connection line of the two guide rails is perpendicular to the connection line of the two rotating shafts. An outer mold seat is arranged on the guide rail near the center of the worktable, and the outer mold seat is slidingly matched with the guide rail. The outer mold oil cylinder is fixedly arranged at the two ends of the worktable, and the piston rod of the outer mold oil cylinder is connected with the outer mold base for pushing the outer mold base to move to the center of the worktable on the guide rail. The left outer mold and the right outer mold are relatively fixed in the two outer mold bases. When the mold is closed, under the control of the electric control device, the outer mold cylinder is activated to make the outer mold base move to the center of the worktable from the left and right sides respectively, namely The outer mold can be closed.
[0022] The center core mechanism is arranged below the worktable at a position opposite to the through hole on the worktable, and includes a guide column I, a core mold base, a core mold support 10 and a core mold cylinder 11. The mandrel support is fixedly arranged on the lower bottom surface of the worktable through four uprights. The lower bottom surface of the mandrel support is fixedly provided with a mandrel oil cylinder. The piston rod of the mandrel oil cylinder is connected with the bottom end of the guide column I through a fixed plate for guiding The column I passes through the mandrel support and is slidably fitted with the mandrel support. The top of the guide column I is provided with a mandrel seat for fixing the lower drawing mold. The lower drawing mold is fixedly arranged on the upper end surface of the core mold base. When the center core mechanism is in motion, under the control of the electric control device, the core mold cylinder pushes the guide column I toward the table, and at the same time the core mold seat at the top of the guide column I and the lower part fixed on the upper end of the core mold seat The drawing molds all move to the worktable. When the lower drawing mold reaches the specified position, the core mold cylinder stops moving.
[0023] The top mold mechanism is arranged at a position opposite to the through hole above the worktable, corresponding to the core mechanism. The top mold mechanism includes a guide column II, a top mold support frame 2, a top mold seat, and a top mold cylinder 5. The top mold support frame is fixedly arranged on the workbench, the guide column II passes through the top mold support frame and is slidably fitted with the top mold support frame, the top mold cylinder is fixed on the top surface of the top mold support frame, and the top of the guide column Ⅱ The piston rod of the mold oil cylinder is connected by a connecting plate, the bottom end of the guide column II is fixedly provided with a mounting top mold seat, and the top mold is placed in the top mold seat. When the top mold mechanism is in motion, under the control of the electrical control device, the top mold cylinder shrinks, driving the guide column II to move to the center of the worktable; at the same time, the top mold seat located at the bottom end of the guide column II and fixed under the top mold seat The top mold on the end face moves to the worktable. When the top mold reaches the designated position, the top mold cylinder stops moving.
[0024] A manipulator 8 is provided on the side of the top mold mechanism on the frame, which is used to automatically take out the casting blank and place it in a designated position after the casting is completed. The manipulator is set on the frame through the manipulator bracket 3, and includes a guide column III, a sliding block 18, a horizontal movement cylinder 6 and a vertical movement cylinder 7 and an arm 17. The guide column Ⅲ is fixedly arranged on the manipulator support and is arranged horizontally; the sliding block is arranged on the guiding column Ⅲ and is slidingly matched with the guiding column Ⅲ; the arm is arranged on the sliding block. One end of the guide column III is fixedly provided with a horizontal movement oil cylinder. The piston rod of the horizontal movement oil cylinder is connected with one side of the slider to push the slider to move along the guide column III in the horizontal direction to further make the arm on the slider move in the horizontal direction. It moves in the horizontal direction; the vertical movement cylinder is fixed at one end of the sliding block, and the piston rod of the vertical movement cylinder is connected with one end of the arm to push the arm to the center of the worktable for vertical movement. The other end of the arm is provided with two pairs of clamping oil cylinders 16 for clamping the piston blank. The clamping oil cylinders are used for clamping the cast piston blank.
[0025] An electrical cabinet 13 is also installed on the rack. The electrical cabinet is equipped with an electrical control device. The electrical control device is a PLC control system. The PLC automatic programming controller and touch screen control each motor to work, and further control the outer mold mechanism and the core mechanism , The top mold mechanism and the various oil cylinders in the manipulator cooperate with each other. The base of the frame is also provided with a water cooling mechanism and an air cooling mechanism for cooling the mold placed in the casting machine.
[0026] The working process of the present invention is as follows.
[0027] 1) Fixing the mold: first fix the lower drawing mold on the core mold base, the left outer mold and the right outer mold are respectively fixed in the corresponding outer mold base, and the top mold is fixed in the top mold base;
[0028] 2) Closing the outer mold: Start the power switch, and the electrical control device controls the action of the outer mold cylinder. The left outer mold and the right outer mold move to the center of the worktable under the action of the outer mold cylinder on the guide rail, and finally close the outer mold of the piston;
[0029] 3) The top mold descends: the electric control device controls the top mold cylinder, and the top mold moves vertically to the center of the worktable along the guide column II under the action of the top mold cylinder until it reaches the designated position;
[0030] 4) The lower drawing mold rises: the electric control device controls the core mold oil cylinder, and the lower drawing mold moves to the center of the worktable with the guide column I under the action of the core mold oil cylinder until it reaches the designated position and completes the closing of all the molds to make the lower drawing The mold, the left outer mold, the right outer mold and the top mold together form the cavity of the piston casting;
[0031] 5) Horizontal turning of the worktable: The electrical control device controls the turning cylinder, and the workbench moves along the axis of rotation under the action of the turning cylinder; at this time, the left outer mold, right outer mold, top mold and lower drawing mold are made together with the workbench Rotational movement to meet the requirements of liquid pouring angle;
[0032] 6) Workbench return: After pouring is completed, the electrical control device controls the turning cylinder to return the workbench to its original position;
[0033] 7) Mold opening: After delayed cooling, the electric control device controls the top mold cylinder to raise the top mold; controls the action of the outer mold cylinder to move the left and right outer molds to both sides of the worktable;
[0034] 8) The manipulator moves forward horizontally: the manipulator's arm moves along the guide column III in the horizontal direction under the action of the horizontal movement cylinder;
[0035] 9) The manipulator descends vertically: The arm moves vertically to the center of the worktable in the vertical direction under the action of the vertical movement cylinder;
[0036] 10) Clamping the blank piston: by controlling the clamping cylinder, the arm clamps the two blank pistons that have been cast, and the blank piston is placed at the designated position;
[0037] 11) Finally, control the core mold cylinder to lower the lower drawing mold;
[0038] 12) Start the air cooling mechanism and the water cooling mechanism to cool down the piston mold.
